Buffy the Vampire Slayer is a franchise spanning film, television, novels and comics. The titular character, Buffy Summers, is chosen to be the Slayer. The Prophecy of the Slayer states, "Into every generation she is born: one girl in all the world, a chosen one. She alone will wield the strength and skill to fight the vampires, demons, and the forces of darkness; to stop the spread of their evil and the swell of their number. She is the Slayer."
The idea was resurrected as a television series for the WB in 1997 (the series moved to the UPN network for its sixth season, in 2001). Buffy the Vampire Slayer ran for 7 seasons from 1997 to 2003. Sarah Michelle Gellar portrayed Buffy for all 144 episodes.
Dark Horse Comics published a Joss Whedon-helmed canonical follow-up to the Buffy TV series in comic book form. Buffy the Vampire Slayer Season Eight spanned 40 issues from 2007 to 2011. Season Nine's first issue was released in August, 2011.